Raj, R., R. Kumar, B. S. Sidhu, and S. Yakhami. “Serotonin Syndrome Due to Fluoxetine and Tramadol in Renal Impaired Patient”. International Journal of Basic & Clinical Pharmacology, vol. 3, no. 1, Jan. 2017, pp. 227-9, https://www.ijbcp.com/index.php/ijbcp/article/view/984.